Hiring at India's top 10 IT firms saw more than a four-fold increase from the previous year in 2018, according to an analysis by Mint. The top 10 companies added 1,14,390 engineers to their workforce in 2018, it added. The top five IT firms, TCS, Cognizant, Infosys, HCL Technologies and Wipro, added 99,010 employees last year.